You could add telnet@<his hostmask> and tell him to telnet to the bot's port if all else fails - but how is he trying to get on the partyline via irc? The first ident message means he passed. He then needs to /ctcp <bot> chat - this should make the bot connect to him. If his firewall blocks that, then he could try a /dcc chat <bot> to connect out to the bot.